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Finding the Fourth Proportional to 1,050.75, 1,575.76 and 434.19

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Solution

The fourth proportional to 1,050.75, 1,575.76 and 434.19 is: 651.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,050.75 : 1,575.76 = 434.19 : x
  2. Step 2: Convert to fraction form
    1,050.75/1,575.76 = 434.19/x
  3. Step 3: Cross multiply
    1,050.75x = 1,575.76 × 434.19
  4. Step 4: Simplify right side
    1,050.75x = 684,170.27
  5. Step 5: Solve for x
    x = 684,170.27/1,050.75
  6. Step 6: Final answer
    x = 651.12

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.